Some misconceptions about NOLA
First off, I don't know exactly what happened to the majority of Sooner fans that gave them such a bad impression of NOLA and LSU fans, but I want to set the record straight.
Are there some jerks and over the top fans? Absolutely. Are all fans like that? No. Just a heads up, you will hear "Tiger Bait" early and often. Suggestion: just laugh it off or send a joke back at whoever said it. Louisiana and LSU fans are pretty sarcastic, but one thing that is ingrained in our culture is "ribbing" people. We give it because not only can we take it, we expect it. It's a football game; it's supposed to be fun. I guarantee you if you laugh off the Tiger Bait and shake their hands, they'll buy/give you a beer and food.
Secondly, eat whatever they give you, regardless of its color or name. It's all good and I guarantee you'll never find better food than in New Orleans or at a tailgate around the Dome.
The Dome is actually extremely nice nowadays since they fixed it up after Katrina.
Finally, NOLA may be a dangerous city, but you won't be going around any of the dangerous parts. Downtown is happening and always filled with people and cops, for those who are worried. Bourbon Street is extremely safe and generally has a cop or two on every corner. NOLA is unlike any place you've probably been to. Make sure you get a po-boy. Go to the D-Day museum and/or walk through the French Quarter. Get beignets at Cafe du Monde. I guarantee you'll have a good time. Just a heads-up, LSU is probably staying at the Hilton Riverside and OSU will probably be at the Marriot.